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Merge pull request #114 from puckel/v1.8.2
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Original file line number | Diff line number | Diff line change |
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""" | ||
Code that goes along with the Airflow located at: | ||
http://airflow.readthedocs.org/en/latest/tutorial.html | ||
""" | ||
from airflow import DAG | ||
from airflow.operators.bash_operator import BashOperator | ||
from datetime import datetime, timedelta | ||
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default_args = { | ||
'owner': 'airflow', | ||
'depends_on_past': False, | ||
'start_date': datetime(2015, 6, 1), | ||
'email': ['airflow@airflow.com'], | ||
'email_on_failure': False, | ||
'email_on_retry': False, | ||
'retries': 1, | ||
'retry_delay': timedelta(minutes=5), | ||
# 'queue': 'bash_queue', | ||
# 'pool': 'backfill', | ||
# 'priority_weight': 10, | ||
# 'end_date': datetime(2016, 1, 1), | ||
} | ||
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dag = DAG( | ||
'tutorial', default_args=default_args, schedule_interval=timedelta(1)) | ||
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# t1, t2 and t3 are examples of tasks created by instantiating operators | ||
t1 = BashOperator( | ||
task_id='print_date', | ||
bash_command='date', | ||
dag=dag) | ||
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t2 = BashOperator( | ||
task_id='sleep', | ||
bash_command='sleep 5', | ||
retries=3, | ||
dag=dag) | ||
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templated_command = """ | ||
{% for i in range(5) %} | ||
echo "{{ ds }}" | ||
echo "{{ macros.ds_add(ds, 7)}}" | ||
echo "{{ params.my_param }}" | ||
{% endfor %} | ||
""" | ||
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t3 = BashOperator( | ||
task_id='templated', | ||
bash_command=templated_command, | ||
params={'my_param': 'Parameter I passed in'}, | ||
dag=dag) | ||
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t2.set_upstream(t1) | ||
t3.set_upstream(t1) |
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